Icy obstacle

Icy obstacle

Getty Images

A man climbs on big chunks of melting ice moving on the Danube River in Belgrade. The thick ice, which had closed hundreds of kilometers of Europe's busy waterway during the region's recent cold snap, started moving the day before because of rising temperatures.

A man climbs on big chunks of melting ice moving on the Danube River in Belgrade. The thick ice, which had closed hundreds of kilometers of Europe's busy waterway during the region's recent cold snap, started moving the day before because of rising temperatures. (Getty Images)

A man climbs on big chunks of melting ice moving on the Danube River in Belgrade. The thick ice, which had closed hundreds of kilometers of Europe's busy waterway during the region's recent cold snap, started moving the day before because of rising temperatures.